1 /* 2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor 3 * with integrated fan control 4 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org> 5 * Based on the lm90 driver. 6 * 7 * The LM63 is a sensor chip made by National Semiconductor. It measures 8 * two temperatures (its own and one external one) and the speed of one 9 * fan, those speed it can additionally control. Complete datasheet can be 10 * obtained from National's website at: 11 * http://www.national.com/pf/LM/LM63.html 12 * 13 * The LM63 is basically an LM86 with fan speed monitoring and control 14 * capabilities added. It misses some of the LM86 features though: 15 * - No low limit for local temperature. 16 * - No critical limit for local temperature. 17 * - Critical limit for remote temperature can be changed only once. We 18 * will consider that the critical limit is read-only. 19 * 20 * The datasheet isn't very clear about what the tachometer reading is. 21 * I had a explanation from National Semiconductor though. The two lower 22 * bits of the read value have to be masked out. The value is still 16 bit 23 * in width. 24 * 25 * This program is free software; you can redistribute it and/or modify 26 * it under the terms of the GNU General Public License as published by 27 * the Free Software Foundation; either version 2 of the License, or 28 * (at your option) any later version. 29 * 30 * This program is distributed in the hope that it will be useful, 31 * but WITHOUT ANY WARRANTY; without even the implied warranty of 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 33 * GNU General Public License for more details. 34 * 35 * You should have received a copy of the GNU General Public License 36 * along with this program; if not, write to the Free Software 37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 38 */ 39 40 #include <linux/module.h> 41 #include <linux/init.h> 42 #include <linux/slab.h> 43 #include <linux/jiffies.h> 44 #include <linux/i2c.h> 45 #include <linux/hwmon-sysfs.h> 46 #include <linux/hwmon.h> 47 #include <linux/err.h> 48 #include <linux/mutex.h> 49 #include <linux/sysfs.h> 50 #include <linux/types.h> 51 52 /* 53 * Addresses to scan 54 * Address is fully defined internally and cannot be changed except for 55 * LM64 which has one pin dedicated to address selection. 56 * LM63 and LM96163 have address 0x4c. 57 * LM64 can have address 0x18 or 0x4e. 58 */ 59 60 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END }; 61 62 /* 63 * The LM63 registers 64 */ 65 66 #define LM63_REG_CONFIG1 0x03 67 #define LM63_REG_CONVRATE 0x04 68 #define LM63_REG_CONFIG2 0xBF 69 #define LM63_REG_CONFIG_FAN 0x4A 70 71 #define LM63_REG_TACH_COUNT_MSB 0x47 72 #define LM63_REG_TACH_COUNT_LSB 0x46 73 #define LM63_REG_TACH_LIMIT_MSB 0x49 74 #define LM63_REG_TACH_LIMIT_LSB 0x48 75 76 #define LM63_REG_PWM_VALUE 0x4C 77 #define LM63_REG_PWM_FREQ 0x4D 78 #define LM63_REG_LUT_TEMP_HYST 0x4F 79 #define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr)) 80 #define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr)) 81 82 #define LM63_REG_LOCAL_TEMP 0x00 83 #define LM63_REG_LOCAL_HIGH 0x05 84 85 #define LM63_REG_REMOTE_TEMP_MSB 0x01 86 #define LM63_REG_REMOTE_TEMP_LSB 0x10 87 #define LM63_REG_REMOTE_OFFSET_MSB 0x11 88 #define LM63_REG_REMOTE_OFFSET_LSB 0x12 89 #define LM63_REG_REMOTE_HIGH_MSB 0x07 90 #define LM63_REG_REMOTE_HIGH_LSB 0x13 91 #define LM63_REG_REMOTE_LOW_MSB 0x08 92 #define LM63_REG_REMOTE_LOW_LSB 0x14 93 #define LM63_REG_REMOTE_TCRIT 0x19 94 #define LM63_REG_REMOTE_TCRIT_HYST 0x21 95 96 #define LM63_REG_ALERT_STATUS 0x02 97 #define LM63_REG_ALERT_MASK 0x16 98 99 #define LM63_REG_MAN_ID 0xFE 100 #define LM63_REG_CHIP_ID 0xFF 101 102 #define LM96163_REG_TRUTHERM 0x30 103 #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31 104 #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32 105 #define LM96163_REG_CONFIG_ENHANCED 0x45 106 107 #define LM63_MAX_CONVRATE 9 108 109 #define LM63_MAX_CONVRATE_HZ 32 110 #define LM96163_MAX_CONVRATE_HZ 26 111 112 /* 113 * Conversions and various macros 114 * For tachometer counts, the LM63 uses 16-bit values. 115 * For local temperature and high limit, remote critical limit and hysteresis 116 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 117 * For remote temperature, low and high limits, it uses signed 11-bit values 118 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 119 * For LM64 the actual remote diode temperature is 16 degree Celsius higher 120 * than the register reading. Remote temperature setpoints have to be 121 * adapted accordingly. 122 */ 123 124 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 125 5400000 / (reg)) 126 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 127 (5400000 / (val)) & 0xFFFC) 128 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 129 #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \ 130 (val) >= 127000 ? 127 : \ 131 (val) < 0 ? ((val) - 500) / 1000 : \ 132 ((val) + 500) / 1000) 133 #define TEMP8U_TO_REG(val) ((val) <= 0 ? 0 : \ 134 (val) >= 255000 ? 255 : \ 135 ((val) + 500) / 1000) 136 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 137 #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \ 138 (val) >= 127875 ? 0x7FE0 : \ 139 (val) < 0 ? ((val) - 62) / 125 * 32 : \ 140 ((val) + 62) / 125 * 32) 141 #define TEMP11U_TO_REG(val) ((val) <= 0 ? 0 : \ 142 (val) >= 255875 ? 0xFFE0 : \ 143 ((val) + 62) / 125 * 32) 144 #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \ 145 (val) >= 127000 ? 127 : \ 146 ((val) + 500) / 1000) 147 148 #define UPDATE_INTERVAL(max, rate) \ 149 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max)) 150 151 enum chips { lm63, lm64, lm96163 }; 152 153 /* 154 * Client data (each client gets its own) 155 */ 156 157 struct lm63_data { 158 struct device *hwmon_dev; 159 struct mutex update_lock; 160 char valid; /* zero until following fields are valid */ 161 char lut_valid; /* zero until lut fields are valid */ 162 unsigned long last_updated; /* in jiffies */ 163 unsigned long lut_last_updated; /* in jiffies */ 164 enum chips kind; 165 int temp2_offset; 166 167 int update_interval; /* in milliseconds */ 168 int max_convrate_hz; 169 int lut_size; /* 8 or 12 */ 170 171 /* registers values */ 172 u8 config, config_fan; 173 u16 fan[2]; /* 0: input 174 1: low limit */ 175 u8 pwm1_freq; 176 u8 pwm1[13]; /* 0: current output 177 1-12: lookup table */ 178 s8 temp8[15]; /* 0: local input 179 1: local high limit 180 2: remote critical limit 181 3-14: lookup table */ 182 s16 temp11[4]; /* 0: remote input 183 1: remote low limit 184 2: remote high limit 185 3: remote offset */ 186 u16 temp11u; /* remote input (unsigned) */ 187 u8 temp2_crit_hyst; 188 u8 lut_temp_hyst; 189 u8 alarms; 190 bool pwm_highres; 191 bool lut_temp_highres; 192 bool remote_unsigned; /* true if unsigned remote upper limits */ 193 bool trutherm; 194 }; 195 196 static inline int temp8_from_reg(struct lm63_data *data, int nr) 197 { 198 if (data->remote_unsigned) 199 return TEMP8_FROM_REG((u8)data->temp8[nr]); 200 return TEMP8_FROM_REG(data->temp8[nr]); 201 } 202 203 static inline int lut_temp_from_reg(struct lm63_data *data, int nr) 204 { 205 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); 206 } 207 208 static inline int lut_temp_to_reg(struct lm63_data *data, long val) 209 { 210 val -= data->temp2_offset; 211 if (data->lut_temp_highres) 212 return DIV_ROUND_CLOSEST(SENSORS_LIMIT(val, 0, 127500), 500); 213 else 214 return DIV_ROUND_CLOSEST(SENSORS_LIMIT(val, 0, 127000), 1000); 215 } 216 217 /* 218 * Update the lookup table register cache. 219 * client->update_lock must be held when calling this function. 220 */ 221 static void lm63_update_lut(struct i2c_client *client) 222 { 223 struct lm63_data *data = i2c_get_clientdata(client); 224 int i; 225 226 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || 227 !data->lut_valid) { 228 for (i = 0; i < data->lut_size; i++) { 229 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, 230 LM63_REG_LUT_PWM(i)); 231 data->temp8[3 + i] = i2c_smbus_read_byte_data(client, 232 LM63_REG_LUT_TEMP(i)); 233 } 234 data->lut_temp_hyst = i2c_smbus_read_byte_data(client, 235 LM63_REG_LUT_TEMP_HYST); 236 237 data->lut_last_updated = jiffies; 238 data->lut_valid = 1; 239 } 240 } 241 242 static struct lm63_data *lm63_update_device(struct device *dev) 243 { 244 struct i2c_client *client = to_i2c_client(dev); 245 struct lm63_data *data = i2c_get_clientdata(client); 246 unsigned long next_update; 247 248 mutex_lock(&data->update_lock); 249 250 next_update = data->last_updated 251 + msecs_to_jiffies(data->update_interval) + 1; 252 253 if (time_after(jiffies, next_update) || !data->valid) { 254 if (data->config & 0x04) { /* tachometer enabled */ 255 /* order matters for fan1_input */ 256 data->fan[0] = i2c_smbus_read_byte_data(client, 257 LM63_REG_TACH_COUNT_LSB) & 0xFC; 258 data->fan[0] |= i2c_smbus_read_byte_data(client, 259 LM63_REG_TACH_COUNT_MSB) << 8; 260 data->fan[1] = (i2c_smbus_read_byte_data(client, 261 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 262 | (i2c_smbus_read_byte_data(client, 263 LM63_REG_TACH_LIMIT_MSB) << 8); 264 } 265 266 data->pwm1_freq = i2c_smbus_read_byte_data(client, 267 LM63_REG_PWM_FREQ); 268 if (data->pwm1_freq == 0) 269 data->pwm1_freq = 1; 270 data->pwm1[0] = i2c_smbus_read_byte_data(client, 271 LM63_REG_PWM_VALUE); 272 273 data->temp8[0] = i2c_smbus_read_byte_data(client, 274 LM63_REG_LOCAL_TEMP); 275 data->temp8[1] = i2c_smbus_read_byte_data(client, 276 LM63_REG_LOCAL_HIGH); 277 278 /* order matters for temp2_input */ 279 data->temp11[0] = i2c_smbus_read_byte_data(client, 280 LM63_REG_REMOTE_TEMP_MSB) << 8; 281 data->temp11[0] |= i2c_smbus_read_byte_data(client, 282 LM63_REG_REMOTE_TEMP_LSB); 283 data->temp11[1] = (i2c_smbus_read_byte_data(client, 284 LM63_REG_REMOTE_LOW_MSB) << 8) 285 | i2c_smbus_read_byte_data(client, 286 LM63_REG_REMOTE_LOW_LSB); 287 data->temp11[2] = (i2c_smbus_read_byte_data(client, 288 LM63_REG_REMOTE_HIGH_MSB) << 8) 289 | i2c_smbus_read_byte_data(client, 290 LM63_REG_REMOTE_HIGH_LSB); 291 data->temp11[3] = (i2c_smbus_read_byte_data(client, 292 LM63_REG_REMOTE_OFFSET_MSB) << 8) 293 | i2c_smbus_read_byte_data(client, 294 LM63_REG_REMOTE_OFFSET_LSB); 295 296 if (data->kind == lm96163) 297 data->temp11u = (i2c_smbus_read_byte_data(client, 298 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 299 | i2c_smbus_read_byte_data(client, 300 LM96163_REG_REMOTE_TEMP_U_LSB); 301 302 data->temp8[2] = i2c_smbus_read_byte_data(client, 303 LM63_REG_REMOTE_TCRIT); 304 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 305 LM63_REG_REMOTE_TCRIT_HYST); 306 307 data->alarms = i2c_smbus_read_byte_data(client, 308 LM63_REG_ALERT_STATUS) & 0x7F; 309 310 data->last_updated = jiffies; 311 data->valid = 1; 312 } 313 314 lm63_update_lut(client); 315 316 mutex_unlock(&data->update_lock); 317 318 return data; 319 } 320 321 /* 322 * Trip points in the lookup table should be in ascending order for both 323 * temperatures and PWM output values. 324 */ 325 static int lm63_lut_looks_bad(struct i2c_client *client) 326 { 327 struct lm63_data *data = i2c_get_clientdata(client); 328 int i; 329 330 mutex_lock(&data->update_lock); 331 lm63_update_lut(client); 332 333 for (i = 1; i < data->lut_size; i++) { 334 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] 335 || data->temp8[3 + i - 1] > data->temp8[3 + i]) { 336 dev_warn(&client->dev, 337 "Lookup table doesn't look sane (check entries %d and %d)\n", 338 i, i + 1); 339 break; 340 } 341 } 342 mutex_unlock(&data->update_lock); 343 344 return i == data->lut_size ? 0 : 1; 345 } 346 347 /* 348 * Sysfs callback functions and files 349 */ 350 351 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 352 char *buf) 353 { 354 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 355 struct lm63_data *data = lm63_update_device(dev); 356 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); 357 } 358 359 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 360 const char *buf, size_t count) 361 { 362 struct i2c_client *client = to_i2c_client(dev); 363 struct lm63_data *data = i2c_get_clientdata(client); 364 unsigned long val; 365 int err; 366 367 err = kstrtoul(buf, 10, &val); 368 if (err) 369 return err; 370 371 mutex_lock(&data->update_lock); 372 data->fan[1] = FAN_TO_REG(val); 373 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 374 data->fan[1] & 0xFF); 375 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 376 data->fan[1] >> 8); 377 mutex_unlock(&data->update_lock); 378 return count; 379 } 380 381 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 382 char *buf) 383 { 384 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 385 struct lm63_data *data = lm63_update_device(dev); 386 int nr = attr->index; 387 int pwm; 388 389 if (data->pwm_highres) 390 pwm = data->pwm1[nr]; 391 else 392 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? 393 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / 394 (2 * data->pwm1_freq); 395 396 return sprintf(buf, "%d\n", pwm); 397 } 398 399 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 400 const char *buf, size_t count) 401 { 402 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 403 struct i2c_client *client = to_i2c_client(dev); 404 struct lm63_data *data = i2c_get_clientdata(client); 405 int nr = attr->index; 406 unsigned long val; 407 int err; 408 u8 reg; 409 410 if (!(data->config_fan & 0x20)) /* register is read-only */ 411 return -EPERM; 412 413 err = kstrtoul(buf, 10, &val); 414 if (err) 415 return err; 416 417 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 418 val = SENSORS_LIMIT(val, 0, 255); 419 420 mutex_lock(&data->update_lock); 421 data->pwm1[nr] = data->pwm_highres ? val : 422 (val * data->pwm1_freq * 2 + 127) / 255; 423 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]); 424 mutex_unlock(&data->update_lock); 425 return count; 426 } 427 428 static ssize_t show_pwm1_enable(struct device *dev, 429 struct device_attribute *dummy, char *buf) 430 { 431 struct lm63_data *data = lm63_update_device(dev); 432 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 433 } 434 435 static ssize_t set_pwm1_enable(struct device *dev, 436 struct device_attribute *dummy, 437 const char *buf, size_t count) 438 { 439 struct i2c_client *client = to_i2c_client(dev); 440 struct lm63_data *data = i2c_get_clientdata(client); 441 unsigned long val; 442 int err; 443 444 err = kstrtoul(buf, 10, &val); 445 if (err) 446 return err; 447 if (val < 1 || val > 2) 448 return -EINVAL; 449 450 /* 451 * Only let the user switch to automatic mode if the lookup table 452 * looks sane. 453 */ 454 if (val == 2 && lm63_lut_looks_bad(client)) 455 return -EPERM; 456 457 mutex_lock(&data->update_lock); 458 data->config_fan = i2c_smbus_read_byte_data(client, 459 LM63_REG_CONFIG_FAN); 460 if (val == 1) 461 data->config_fan |= 0x20; 462 else 463 data->config_fan &= ~0x20; 464 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 465 data->config_fan); 466 mutex_unlock(&data->update_lock); 467 return count; 468 } 469 470 /* 471 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 472 * For remote sensor registers temp2_offset has to be considered, 473 * for local sensor it must not. 474 * So we need separate 8bit accessors for local and remote sensor. 475 */ 476 static ssize_t show_local_temp8(struct device *dev, 477 struct device_attribute *devattr, 478 char *buf) 479 { 480 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 481 struct lm63_data *data = lm63_update_device(dev); 482 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 483 } 484 485 static ssize_t show_remote_temp8(struct device *dev, 486 struct device_attribute *devattr, 487 char *buf) 488 { 489 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 490 struct lm63_data *data = lm63_update_device(dev); 491 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 492 + data->temp2_offset); 493 } 494 495 static ssize_t show_lut_temp(struct device *dev, 496 struct device_attribute *devattr, 497 char *buf) 498 { 499 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 500 struct lm63_data *data = lm63_update_device(dev); 501 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 502 + data->temp2_offset); 503 } 504 505 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 506 const char *buf, size_t count) 507 { 508 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 509 struct i2c_client *client = to_i2c_client(dev); 510 struct lm63_data *data = i2c_get_clientdata(client); 511 int nr = attr->index; 512 long val; 513 int err; 514 int temp; 515 u8 reg; 516 517 err = kstrtol(buf, 10, &val); 518 if (err) 519 return err; 520 521 mutex_lock(&data->update_lock); 522 switch (nr) { 523 case 2: 524 reg = LM63_REG_REMOTE_TCRIT; 525 if (data->remote_unsigned) 526 temp = TEMP8U_TO_REG(val - data->temp2_offset); 527 else 528 temp = TEMP8_TO_REG(val - data->temp2_offset); 529 break; 530 case 1: 531 reg = LM63_REG_LOCAL_HIGH; 532 temp = TEMP8_TO_REG(val); 533 break; 534 default: /* lookup table */ 535 reg = LM63_REG_LUT_TEMP(nr - 3); 536 temp = lut_temp_to_reg(data, val); 537 } 538 data->temp8[nr] = temp; 539 i2c_smbus_write_byte_data(client, reg, temp); 540 mutex_unlock(&data->update_lock); 541 return count; 542 } 543 544 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 545 char *buf) 546 { 547 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 548 struct lm63_data *data = lm63_update_device(dev); 549 int nr = attr->index; 550 int temp; 551 552 if (!nr) { 553 /* 554 * Use unsigned temperature unless its value is zero. 555 * If it is zero, use signed temperature. 556 */ 557 if (data->temp11u) 558 temp = TEMP11_FROM_REG(data->temp11u); 559 else 560 temp = TEMP11_FROM_REG(data->temp11[nr]); 561 } else { 562 if (data->remote_unsigned && nr == 2) 563 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 564 else 565 temp = TEMP11_FROM_REG(data->temp11[nr]); 566 } 567 return sprintf(buf, "%d\n", temp + data->temp2_offset); 568 } 569 570 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 571 const char *buf, size_t count) 572 { 573 static const u8 reg[6] = { 574 LM63_REG_REMOTE_LOW_MSB, 575 LM63_REG_REMOTE_LOW_LSB, 576 LM63_REG_REMOTE_HIGH_MSB, 577 LM63_REG_REMOTE_HIGH_LSB, 578 LM63_REG_REMOTE_OFFSET_MSB, 579 LM63_REG_REMOTE_OFFSET_LSB, 580 }; 581 582 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 583 struct i2c_client *client = to_i2c_client(dev); 584 struct lm63_data *data = i2c_get_clientdata(client); 585 long val; 586 int err; 587 int nr = attr->index; 588 589 err = kstrtol(buf, 10, &val); 590 if (err) 591 return err; 592 593 mutex_lock(&data->update_lock); 594 if (data->remote_unsigned && nr == 2) 595 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 596 else 597 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 598 599 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 600 data->temp11[nr] >> 8); 601 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 602 data->temp11[nr] & 0xff); 603 mutex_unlock(&data->update_lock); 604 return count; 605 } 606 607 /* 608 * Hysteresis register holds a relative value, while we want to present 609 * an absolute to user-space 610 */ 611 static ssize_t show_temp2_crit_hyst(struct device *dev, 612 struct device_attribute *dummy, char *buf) 613 { 614 struct lm63_data *data = lm63_update_device(dev); 615 return sprintf(buf, "%d\n", temp8_from_reg(data, 2) 616 + data->temp2_offset 617 - TEMP8_FROM_REG(data->temp2_crit_hyst)); 618 } 619 620 static ssize_t show_lut_temp_hyst(struct device *dev, 621 struct device_attribute *devattr, char *buf) 622 { 623 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 624 struct lm63_data *data = lm63_update_device(dev); 625 626 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 627 + data->temp2_offset 628 - TEMP8_FROM_REG(data->lut_temp_hyst)); 629 } 630 631 /* 632 * And now the other way around, user-space provides an absolute 633 * hysteresis value and we have to store a relative one 634 */ 635 static ssize_t set_temp2_crit_hyst(struct device *dev, 636 struct device_attribute *dummy, 637 const char *buf, size_t count) 638 { 639 struct i2c_client *client = to_i2c_client(dev); 640 struct lm63_data *data = i2c_get_clientdata(client); 641 long val; 642 int err; 643 long hyst; 644 645 err = kstrtol(buf, 10, &val); 646 if (err) 647 return err; 648 649 mutex_lock(&data->update_lock); 650 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 651 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 652 HYST_TO_REG(hyst)); 653 mutex_unlock(&data->update_lock); 654 return count; 655 } 656 657 /* 658 * Set conversion rate. 659 * client->update_lock must be held when calling this function. 660 */ 661 static void lm63_set_convrate(struct i2c_client *client, struct lm63_data *data, 662 unsigned int interval) 663 { 664 int i; 665 unsigned int update_interval; 666 667 /* Shift calculations to avoid rounding errors */ 668 interval <<= 6; 669 670 /* find the nearest update rate */ 671 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 672 / data->max_convrate_hz; 673 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 674 if (interval >= update_interval * 3 / 4) 675 break; 676 677 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 678 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 679 } 680 681 static ssize_t show_update_interval(struct device *dev, 682 struct device_attribute *attr, char *buf) 683 { 684 struct lm63_data *data = dev_get_drvdata(dev); 685 686 return sprintf(buf, "%u\n", data->update_interval); 687 } 688 689 static ssize_t set_update_interval(struct device *dev, 690 struct device_attribute *attr, 691 const char *buf, size_t count) 692 { 693 struct i2c_client *client = to_i2c_client(dev); 694 struct lm63_data *data = i2c_get_clientdata(client); 695 unsigned long val; 696 int err; 697 698 err = kstrtoul(buf, 10, &val); 699 if (err) 700 return err; 701 702 mutex_lock(&data->update_lock); 703 lm63_set_convrate(client, data, SENSORS_LIMIT(val, 0, 100000)); 704 mutex_unlock(&data->update_lock); 705 706 return count; 707 } 708 709 static ssize_t show_type(struct device *dev, struct device_attribute *attr, 710 char *buf) 711 { 712 struct i2c_client *client = to_i2c_client(dev); 713 struct lm63_data *data = i2c_get_clientdata(client); 714 715 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 716 } 717 718 static ssize_t set_type(struct device *dev, struct device_attribute *attr, 719 const char *buf, size_t count) 720 { 721 struct i2c_client *client = to_i2c_client(dev); 722 struct lm63_data *data = i2c_get_clientdata(client); 723 unsigned long val; 724 int ret; 725 u8 reg; 726 727 ret = kstrtoul(buf, 10, &val); 728 if (ret < 0) 729 return ret; 730 if (val != 1 && val != 2) 731 return -EINVAL; 732 733 mutex_lock(&data->update_lock); 734 data->trutherm = val == 1; 735 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 736 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 737 reg | (data->trutherm ? 0x02 : 0x00)); 738 data->valid = 0; 739 mutex_unlock(&data->update_lock); 740 741 return count; 742 } 743 744 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, 745 char *buf) 746 { 747 struct lm63_data *data = lm63_update_device(dev); 748 return sprintf(buf, "%u\n", data->alarms); 749 } 750 751 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 752 char *buf) 753 { 754 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 755 struct lm63_data *data = lm63_update_device(dev); 756 int bitnr = attr->index; 757 758 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 759 } 760 761 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 762 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 763 set_fan, 1); 764 765 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 766 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 767 show_pwm1_enable, set_pwm1_enable); 768 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 769 show_pwm1, set_pwm1, 1); 770 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 771 show_lut_temp, set_temp8, 3); 772 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 773 show_lut_temp_hyst, NULL, 3); 774 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 775 show_pwm1, set_pwm1, 2); 776 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 777 show_lut_temp, set_temp8, 4); 778 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 779 show_lut_temp_hyst, NULL, 4); 780 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 781 show_pwm1, set_pwm1, 3); 782 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 783 show_lut_temp, set_temp8, 5); 784 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 785 show_lut_temp_hyst, NULL, 5); 786 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 787 show_pwm1, set_pwm1, 4); 788 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 789 show_lut_temp, set_temp8, 6); 790 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 791 show_lut_temp_hyst, NULL, 6); 792 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 793 show_pwm1, set_pwm1, 5); 794 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 795 show_lut_temp, set_temp8, 7); 796 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 797 show_lut_temp_hyst, NULL, 7); 798 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 799 show_pwm1, set_pwm1, 6); 800 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 801 show_lut_temp, set_temp8, 8); 802 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 803 show_lut_temp_hyst, NULL, 8); 804 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 805 show_pwm1, set_pwm1, 7); 806 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 807 show_lut_temp, set_temp8, 9); 808 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 809 show_lut_temp_hyst, NULL, 9); 810 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 811 show_pwm1, set_pwm1, 8); 812 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 813 show_lut_temp, set_temp8, 10); 814 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 815 show_lut_temp_hyst, NULL, 10); 816 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 817 show_pwm1, set_pwm1, 9); 818 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 819 show_lut_temp, set_temp8, 11); 820 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 821 show_lut_temp_hyst, NULL, 11); 822 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 823 show_pwm1, set_pwm1, 10); 824 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 825 show_lut_temp, set_temp8, 12); 826 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 827 show_lut_temp_hyst, NULL, 12); 828 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 829 show_pwm1, set_pwm1, 11); 830 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 831 show_lut_temp, set_temp8, 13); 832 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 833 show_lut_temp_hyst, NULL, 13); 834 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 835 show_pwm1, set_pwm1, 12); 836 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 837 show_lut_temp, set_temp8, 14); 838 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 839 show_lut_temp_hyst, NULL, 14); 840 841 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 842 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 843 set_temp8, 1); 844 845 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 846 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 847 set_temp11, 1); 848 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 849 set_temp11, 2); 850 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 851 set_temp11, 3); 852 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 853 set_temp8, 2); 854 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, 855 set_temp2_crit_hyst); 856 857 static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type); 858 859 /* Individual alarm files */ 860 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 861 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 862 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 863 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 864 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 865 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 866 /* Raw alarm file for compatibility */ 867 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 868 869 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, 870 set_update_interval); 871 872 static struct attribute *lm63_attributes[] = { 873 &sensor_dev_attr_pwm1.dev_attr.attr, 874 &dev_attr_pwm1_enable.attr, 875 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 876 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 877 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 878 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 879 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 880 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 881 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 882 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 883 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 884 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 885 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 886 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 887 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 888 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 889 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 890 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 891 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 892 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 893 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 894 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 895 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 896 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 897 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 898 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 899 900 &sensor_dev_attr_temp1_input.dev_attr.attr, 901 &sensor_dev_attr_temp2_input.dev_attr.attr, 902 &sensor_dev_attr_temp2_min.dev_attr.attr, 903 &sensor_dev_attr_temp1_max.dev_attr.attr, 904 &sensor_dev_attr_temp2_max.dev_attr.attr, 905 &sensor_dev_attr_temp2_offset.dev_attr.attr, 906 &sensor_dev_attr_temp2_crit.dev_attr.attr, 907 &dev_attr_temp2_crit_hyst.attr, 908 909 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 910 &sensor_dev_attr_temp2_fault.dev_attr.attr, 911 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 912 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 913 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 914 &dev_attr_alarms.attr, 915 &dev_attr_update_interval.attr, 916 NULL 917 }; 918 919 static struct attribute *lm63_attributes_extra_lut[] = { 920 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 921 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 922 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 923 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 924 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 925 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 926 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 927 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 928 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 929 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 930 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 931 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 932 NULL 933 }; 934 935 static const struct attribute_group lm63_group_extra_lut = { 936 .attrs = lm63_attributes_extra_lut, 937 }; 938 939 /* 940 * On LM63, temp2_crit can be set only once, which should be job 941 * of the bootloader. 942 * On LM64, temp2_crit can always be set. 943 * On LM96163, temp2_crit can be set if bit 1 of the configuration 944 * register is true. 945 */ 946 static umode_t lm63_attribute_mode(struct kobject *kobj, 947 struct attribute *attr, int index) 948 { 949 struct device *dev = container_of(kobj, struct device, kobj); 950 struct i2c_client *client = to_i2c_client(dev); 951 struct lm63_data *data = i2c_get_clientdata(client); 952 953 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 954 && (data->kind == lm64 || 955 (data->kind == lm96163 && (data->config & 0x02)))) 956 return attr->mode | S_IWUSR; 957 958 return attr->mode; 959 } 960 961 static const struct attribute_group lm63_group = { 962 .is_visible = lm63_attribute_mode, 963 .attrs = lm63_attributes, 964 }; 965 966 static struct attribute *lm63_attributes_fan1[] = { 967 &sensor_dev_attr_fan1_input.dev_attr.attr, 968 &sensor_dev_attr_fan1_min.dev_attr.attr, 969 970 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 971 NULL 972 }; 973 974 static const struct attribute_group lm63_group_fan1 = { 975 .attrs = lm63_attributes_fan1, 976 }; 977 978 /* 979 * Real code 980 */ 981 982 /* Return 0 if detection is successful, -ENODEV otherwise */ 983 static int lm63_detect(struct i2c_client *client, 984 struct i2c_board_info *info) 985 { 986 struct i2c_adapter *adapter = client->adapter; 987 u8 man_id, chip_id, reg_config1, reg_config2; 988 u8 reg_alert_status, reg_alert_mask; 989 int address = client->addr; 990 991 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 992 return -ENODEV; 993 994 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 995 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 996 997 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 998 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 999 reg_alert_status = i2c_smbus_read_byte_data(client, 1000 LM63_REG_ALERT_STATUS); 1001 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 1002 1003 if (man_id != 0x01 /* National Semiconductor */ 1004 || (reg_config1 & 0x18) != 0x00 1005 || (reg_config2 & 0xF8) != 0x00 1006 || (reg_alert_status & 0x20) != 0x00 1007 || (reg_alert_mask & 0xA4) != 0xA4) { 1008 dev_dbg(&adapter->dev, 1009 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1010 man_id, chip_id); 1011 return -ENODEV; 1012 } 1013 1014 if (chip_id == 0x41 && address == 0x4c) 1015 strlcpy(info->type, "lm63", I2C_NAME_SIZE); 1016 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1017 strlcpy(info->type, "lm64", I2C_NAME_SIZE); 1018 else if (chip_id == 0x49 && address == 0x4c) 1019 strlcpy(info->type, "lm96163", I2C_NAME_SIZE); 1020 else 1021 return -ENODEV; 1022 1023 return 0; 1024 } 1025 1026 /* 1027 * Ideally we shouldn't have to initialize anything, since the BIOS 1028 * should have taken care of everything 1029 */ 1030 static void lm63_init_client(struct i2c_client *client) 1031 { 1032 struct lm63_data *data = i2c_get_clientdata(client); 1033 u8 convrate; 1034 1035 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1036 data->config_fan = i2c_smbus_read_byte_data(client, 1037 LM63_REG_CONFIG_FAN); 1038 1039 /* Start converting if needed */ 1040 if (data->config & 0x40) { /* standby */ 1041 dev_dbg(&client->dev, "Switching to operational mode\n"); 1042 data->config &= 0xA7; 1043 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1044 data->config); 1045 } 1046 /* Tachometer is always enabled on LM64 */ 1047 if (data->kind == lm64) 1048 data->config |= 0x04; 1049 1050 /* We may need pwm1_freq before ever updating the client data */ 1051 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1052 if (data->pwm1_freq == 0) 1053 data->pwm1_freq = 1; 1054 1055 switch (data->kind) { 1056 case lm63: 1057 case lm64: 1058 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1059 data->lut_size = 8; 1060 break; 1061 case lm96163: 1062 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1063 data->lut_size = 12; 1064 data->trutherm 1065 = i2c_smbus_read_byte_data(client, 1066 LM96163_REG_TRUTHERM) & 0x02; 1067 break; 1068 } 1069 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1070 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1071 convrate = LM63_MAX_CONVRATE; 1072 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1073 convrate); 1074 1075 /* 1076 * For LM96163, check if high resolution PWM 1077 * and unsigned temperature format is enabled. 1078 */ 1079 if (data->kind == lm96163) { 1080 u8 config_enhanced 1081 = i2c_smbus_read_byte_data(client, 1082 LM96163_REG_CONFIG_ENHANCED); 1083 if (config_enhanced & 0x20) 1084 data->lut_temp_highres = true; 1085 if ((config_enhanced & 0x10) 1086 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1087 data->pwm_highres = true; 1088 if (config_enhanced & 0x08) 1089 data->remote_unsigned = true; 1090 } 1091 1092 /* Show some debug info about the LM63 configuration */ 1093 if (data->kind == lm63) 1094 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", 1095 (data->config & 0x04) ? "tachometer input" : 1096 "alert output"); 1097 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", 1098 (data->config_fan & 0x08) ? "1.4" : "360", 1099 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1100 dev_dbg(&client->dev, "PWM output active %s, %s mode\n", 1101 (data->config_fan & 0x10) ? "low" : "high", 1102 (data->config_fan & 0x20) ? "manual" : "auto"); 1103 } 1104 1105 static int lm63_probe(struct i2c_client *client, 1106 const struct i2c_device_id *id) 1107 { 1108 struct lm63_data *data; 1109 int err; 1110 1111 data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL); 1112 if (!data) { 1113 err = -ENOMEM; 1114 goto exit; 1115 } 1116 1117 i2c_set_clientdata(client, data); 1118 data->valid = 0; 1119 mutex_init(&data->update_lock); 1120 1121 /* Set the device type */ 1122 data->kind = id->driver_data; 1123 if (data->kind == lm64) 1124 data->temp2_offset = 16000; 1125 1126 /* Initialize chip */ 1127 lm63_init_client(client); 1128 1129 /* Register sysfs hooks */ 1130 err = sysfs_create_group(&client->dev.kobj, &lm63_group); 1131 if (err) 1132 goto exit_free; 1133 if (data->config & 0x04) { /* tachometer enabled */ 1134 err = sysfs_create_group(&client->dev.kobj, &lm63_group_fan1); 1135 if (err) 1136 goto exit_remove_files; 1137 } 1138 if (data->kind == lm96163) { 1139 err = device_create_file(&client->dev, &dev_attr_temp2_type); 1140 if (err) 1141 goto exit_remove_files; 1142 1143 err = sysfs_create_group(&client->dev.kobj, 1144 &lm63_group_extra_lut); 1145 if (err) 1146 goto exit_remove_files; 1147 } 1148 1149 data->hwmon_dev = hwmon_device_register(&client->dev); 1150 if (IS_ERR(data->hwmon_dev)) { 1151 err = PTR_ERR(data->hwmon_dev); 1152 goto exit_remove_files; 1153 } 1154 1155 return 0; 1156 1157 exit_remove_files: 1158 sysfs_remove_group(&client->dev.kobj, &lm63_group); 1159 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); 1160 if (data->kind == lm96163) { 1161 device_remove_file(&client->dev, &dev_attr_temp2_type); 1162 sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut); 1163 } 1164 exit_free: 1165 kfree(data); 1166 exit: 1167 return err; 1168 } 1169 1170 static int lm63_remove(struct i2c_client *client) 1171 { 1172 struct lm63_data *data = i2c_get_clientdata(client); 1173 1174 hwmon_device_unregister(data->hwmon_dev); 1175 sysfs_remove_group(&client->dev.kobj, &lm63_group); 1176 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); 1177 if (data->kind == lm96163) { 1178 device_remove_file(&client->dev, &dev_attr_temp2_type); 1179 sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut); 1180 } 1181 1182 kfree(data); 1183 return 0; 1184 } 1185 1186 /* 1187 * Driver data (common to all clients) 1188 */ 1189 1190 static const struct i2c_device_id lm63_id[] = { 1191 { "lm63", lm63 }, 1192 { "lm64", lm64 }, 1193 { "lm96163", lm96163 }, 1194 { } 1195 }; 1196 MODULE_DEVICE_TABLE(i2c, lm63_id); 1197 1198 static struct i2c_driver lm63_driver = { 1199 .class = I2C_CLASS_HWMON, 1200 .driver = { 1201 .name = "lm63", 1202 }, 1203 .probe = lm63_probe, 1204 .remove = lm63_remove, 1205 .id_table = lm63_id, 1206 .detect = lm63_detect, 1207 .address_list = normal_i2c, 1208 }; 1209 1210 module_i2c_driver(lm63_driver); 1211 1212 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 1213 MODULE_DESCRIPTION("LM63 driver"); 1214 MODULE_LICENSE("GPL"); 1215